Tee hee, good luck.
Mine are ace. Well worth the money.
Combined with Ultegra 9sp sti's on a Tripster.
Think mine are journo demo's. They've done a bit more work on the pivots since mine were out to improve performance with Sram and Campag shifters.

I have been mashing some hyrd's on the crosser over the summer. First week of truly shitty conditions, working as they should. Nicely modulated, plenty of power. Paired them with ultegra sti with no fuss, easy to set up. Bit bulky on the eye compared to the spyre, but goes with the agricultural welds on the Pro6! I can't complain as they were an 'industry' gift.

No idea about BB7's other than I wouldn't touch them being an Avid product. I'm not a fan.
The Spyres are lovely on my Tripster. Nice and powerful, easy to set up and work with STI's without any extra gubbins.
The main benefit is that both pitsons move so you aren't left with a slave pad so to speak.
160mm front and rear as the 140mm mount fouled the frame on my Tripster and stopped any side to side adjustment.
JoB has some HyRds on a CX bike. I'll ask him to add some comments.
Lyra's were terrible IMHO. Had two sets to play with and never got them to work nicely.

I preordered mine from Fatbirds a long time ago, they still arrived a good few weeks after the target date so I can't imagine there are many sets knocking around. Certainly not for much cheapness (supply and demand and all that...)

So who's actually got/used Spyres? Initial reports seemed to suggest that they were OK but that the power wasn't great - not up to BB7s at least.

I'm a little underwhelmed at the moment with mine though I need to have a bit of a fettle. Used Jagwire Ripcord compressionless cables and there doesn't seem to be that much 'bite' to them, though I am comparing them to a good set of mini vees with Swissstop pads on the old CX bike and my SLX hydros on the hardtail.

Definitely considering a new set of softer pads (maybe Ceramic Pros) as there was some horrendous squealing in the rain on Sundays ride out.

Nicely made, and I do like the dual piston moving. Setup was okay though the cable routing does seem to point the end of the inner cable into the disk rotor.

They are majorly low profile - to such an extent I didn't actually have to bend the mudguard stays out of the way to get round them.